Improved lock for securing throttle-valves



UNITED STATES PATENT OFFICE..

c. o. ToRRENcE, 0E RTPLEY, OHIO.

Specification forming part of Letters PatentiNo. 56,639, dated July 24,1866.

To all whom t may concern:

Be it known that I, C. C. TORRENCE, of Ripley, in the county of Brownand State of Ohio, have invented a new and useful Improvement inValve-Locks; and I do hereby declare that the following` is a full,clear, and exact description thereof, which will enable others skilledin the art to make and use the same, reference being had to the accompan yin g drawings, forming part of this specification, in which Figurel is a side elevation of a lock made and applied according to myinvention to the throttle-valve of a locomotive, the interior of thelock being partly shown. Fig. 2 is a plan view. Fig. 3 is a sectionthrough the guard and lever and lower end of the lock.

Similar letters of reference indicate like parts.

The object of this invention is to provide a lock to secure any kind ofslide throttle-valve and prevent its being opened unless by one having akey.

In this example of my invention the lock is fitted to be used with thethrottle-valve of an engine, a portion of the boiler heilig shown in redoutline, and also the rod of the throttlevalve, for the purpose ofmaking the explanation of the invention more clear.

The letter A designates the lever by means oi' which the valve isWorked, said lever being pivoted at its lower end between shortstandards B. O is a slotted guard, in the slot of which the valve-levermoves in and out. D is the lock. It is held upon the outer face of thelever by means ot' screws E E working' in the elongated slots at theends of the lock-plate, so that the lock is allowed a limited movementof the lever.

The body ofthe lock is hollow, and is made large enough to contain aspring-catch, F, whose lower end is pivoted to the sides of the body,one end of its pivotl being formed into a button on the outside of thelock, and the edges of the button being suitably notched to receive akey, I, so that the catch can be turned or raised against its spring.

The face of the lever beneath the lock is notched-at two or more placesto receive the edge or tooth ot' the catch, the lower sides ot thenotches being beveled to allow the catch to descend from one notch toanother, but their upper sides being made square to prevent its movementupward. The catch is held down against the lever by a spring applied inany suitable way.

The sides of the lock are made to embrace the edges of that face of thelever along which it moves byforminglips along` its sides, said lipsbeing cut away under its lower end to permit that end ofthe lock tointerlock with the guard by entering its slot at the place ofthe notchesG G on each ot' its inner edges, said notches being made at the level ofthe outer face of the lever when it is at the bottom of the guard.

The construction of the lock and the manner of applying it to the levermay be modified in many ways without departing from the principle ot' myinvention.

The spring which holds the catch down may be made strongenough toprevent the lock from slipping down out of the upper notch of the lever,requiring a little force to make the catch slip over the interveningridge to the notch next below, but when it is desired to unlock it or tomove the'lock to a higher notch the catch must be raised by a key.

Suitable notches can be made in the' edges of the slot in the guard toenable the lock to be applied to secure the lever at such positions asare desired.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The combination of the lock D, slotted guard C, andthe valve-lever A, substantially as described.

The above specification of my invention signed by me this 3d day otApril, 1866.

C. C. TORRENGE.

Witnesses:

R. M. BLAIR, .CHARLES L. GoULD.

